The jailbreak scene is one long cat-and-mouse battle between Apple and the hackers that make the exploits possible, and whenever a jailbreak does become available, such as the Evasi0n7 untether, the onus is then upon Apple to plug the holes. Whereas once upon a time, we'd see an update within the week to patch the jailbreak, things haven't been quite like that this time around, but although the third beta of iOS 7.1 firmware came back negative, so to speak, it looks like Apple has begun patching the exploits with the just-released fourth beta.
By now I'm sure you all know the drill; Apple releases a new beta version of its iPhone and iPad operating system and I download it, use it for a few hours and then report back with what's changed, both good and bad. I've been doing this for a while now, and through the process of writing about changes in betas both big and small I've come across some great improvements as well as some alterations that, looking back, probably weren't the best idea Apple's iOS team ever had.